Medicine bottle cap having dosage means

A medicine bottle unit comprising:

• a bottle having an upper margin, an open top and a closure for the top, said closure including a hollow cap and an inner member within the cap, the bottle having a number of circumferentially spaced first bosses on the upper margin thereof, said cap having an inner peripheral surface with a number of circumferentially spaced second bosses thereon, each second boss being movable into engagement with and beneath a respective one of said first bosses to releasably interconnect the cap and the bottle as the cap is moved in a first direction relative to the bottle, the cap having a number of circumferentially spaced grooves in the inner peripheral surface thereof, said inner member having an outer peripheral surface, there being a number of lateral projections on said outer peripheral surface of the inner member, the projection being removably receivable within the grooves of the cap, said grooves and projections defining a clutch permitting rotation of the cap relative to the inner member when the cap rotates in said first direction relative to the bottle and permitting rotation of the cap and inner member together when the cap is rotated in the opposite direction relative to the bottle, said inner member having means engageable with at least one of said first bosses of the bottle for preventing rotation of the inner member relative to the bottle when the cap is rotated in said first direction, said cap having a hole in the top thereof, said inner member having a mounting part rotatably receivable in the hole, there being relatively shiftable indicia on the cap and inner member.